3-Chloropropyltrimethoxysilane (IOTA-1311) is a typical organosilane monomer with the chemical formula C6H15ClO3Si. It is a colorless, transparent liquid with a slightly pungent odor, readily soluble in organic solvents such as methanol and ethanol, but insoluble in water. Its molecule contains both an organic active group (–CH2CH2CH2Cl) and a hydrolyzable trimethoxysilane group (–Si(OCH3)3). It is this combination of two functional groups that makes it an important "molecular bridge" between organic and inorganic materials.

In chemical reactions, 3-chloropropyltrimethoxysilane can undergo further substitution reactions via the chloropropyl group to generate various functionalized silanes, such as aminopropyl, epoxypropoxy, and mercaptopropyl derivatives. These derivatives are widely used in coupling agents, surface modifiers, and adhesive reinforcing agents, making them a strategically important basic raw material in the silane industry.

Furthermore, IOTA-1311 exhibits good reactivity and stability during synthesis, making it an important intermediate for the synthesis of coupling agents such as A-111, A-112, and O-174. Due to its excellent chemical properties, IOTA-1311 is widely used in various fields including chemical engineering, electronics, electrical insulation, architectural coatings, and plastic modification, becoming an indispensable key raw material in the organosilicon industry.